Pipe-cutter



(No Model.)

G. F. POTTLE.

PIPE CUTTER.

No; 455,415. Patented Dec. 15, 1891.

WITNESSES UNITED STATES PATENT OFFICE.

GEORGE FRANK IOTTLE, OF MEDFORD, MASSACHUSETTS.

PIPE-CUTTER.

SPECIFICATION forming part of Letters Patent No. 465,415, dated December15, 1891.

I Application filed May 5, 1890. Serial No. 350,686. (No model.)

To all whom it may concern: by giving to the springs R a greater or less50 Be it known that I, GEORGE FRANK POT- TLE, of Medford, in the countyof Middlesex and State of Massachusetts, have invented a new and usefulImprovement in Pipe-Cutters, of which the following, taken in connectionwith the accompanying drawings, is a specification.

My invention relates to that class of devices known as pipe-cutters forcutting off iron, brass, and other pipe; and its object is to improvethe construction of these devices, as herein set forth. This object Iattain by the inechanisinshown in the accompanying drawings, in whichFigure 1 is an elevation of my device. Fig. 2 is a vertical longitudinalsection of the 7 same. Fig. 3 is a cross section taken on line 00 0c ofFig. 2.

In the drawings, A A A represent the body.

or frame of the cutter, A being the pipe-holding end, and is to beshaped substantially as shown in Figs. 1 and 2, soas to form a goodresting-place for the pipe P, which is to be operated upon.

A is the shank end of the frame and has a socket S to receive the shankor handle S, Fig. 2.

S is an internal screw adapted to receive the screw part of the handleS.

B is a sliding block adapted, to hold the knife or cutting-tool K. Thisblockis forced forward by turning the screw-handle. The cutting-tool Kis held firmly in place by means of a clamping-key L, Fig. 3, theclampingplate L, and the clamp-screws T T.

B represents a second sliding block, which, when the tool is in use, isforced against the pipe to be cut by the thrust of springs R,

interposed between this block B and the block B.

It is desirable that for difierent weights and kinds of pipea greater orless degree of initial stiffness should be given to the springcushionformed by the springs, as above described, and for this purpose I haveprovided adjusting-rods N N, connecting the blocks B and B', by turningwhich rods the two blocks can be brought-together orseparated,'theredegree of initial stiffness.

prevent the tool from jumping ahead when it strikes a thin place in thework, it is obvious that in the case of stock of diiferent thicknesses,where differentdegrees of force may have to be applied to thecutting-tool and its carrying block in order to do the work,

it is very desirable that the initial tension or stiffness of the springshould be variable and the combination of the two sliding blocks, withtheir interposed springs and adj ustingrods, I believe to be a valuableimprovement for this purpose.

It will be understood that the block B is provided with a suitable slotor passage through which the cutting-tool K may pass freely.

To cause the cutting-tool to act upon 'the pipe, the block B is forcedforward by the screw S, and as the springs R R yield, the blockB' willbecome stationary, but resting firmly against the pipe. of the block Bwill cause the cutting-tool K to engage with the pipe, and as the cutteris revolved around the pipe the cutting action will take place. As thechannel made by the toolis deepened, the tool is advanced by shovingforward of the block B, and the channel is made still deeper until itextends entirely 8 through the pipe.

I claim- In an adjustable tension pipe cutter of the characterdescribed, the combination, withthe body or frame and the operatingscrewrod S, of the two-part sliding tool-carrier consisting of the blockB, to which the tool is secured, the supplementary block B, slot-ted toallow the passage of the tool, springs R, interposed between the saidbl'ocks B B and ad- 3' listing-rods N, whereby the distance between theblocks may be varied to adjust the ten sion of the springs, allsubstantially as set forth.

GEORGE FRANK POTTLE.

Witnesses:

FRANK G. PARKER, WILLIAM EDsoN.

As the function of these springs is to act as a cushion and This forwardmotion It is hereby certified that Letters Patent No. 465,415, grantedDecember 15, 1891,

upon the application of George Frank Pottle, of Medford, Massachusetts,for an improvement in Pipe-Cutters, was erroneously issued to the saidPottle as owner of said invention; that said Letters Patent should havebeen issued to Jott Grant, of Boston, Massachusetts, said Grant beingassignee of the entire interest in said invention as shown by theassignments of record in this Office; and that said Letters Patentshould be read with this correction therein that the same may conform tothe record of the casein the Patent Office. 7

Signed, countersigned, and sealed this 19th day of AprihA. D. 1892.

[SEAL] CYRUS BUssnY,

Assfit'tmt Secretary of thelntem'or.

Gountersigned:

W. E. SIMONDs,

Commissioner of Patents.

